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oai:www.ideals.illinois.edu:2142/81225 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Eden, J.G. Herring, Cyrus McNeely 2015-09-25T20:10:08Z 2015-09-25T20:10:08Z 10000-01-01 1998 1998 Laser-induced fluorescence spectra for the $7p\sigma\ \sp3\Sigma\sbsp{g}{+}\gets a\ \sp3\Sigma\sbsp{u}{+}$ transition have led to the first resolved triplet splittings and rotational analyses for Rydberg-Rydberg transitions in Ar$\sb2.$ Analyses for the (0-0), (0-1), (1-0), and (1-1) bands of $7p\sigma\gets a$ are presented here. Bands with $\rm v\sp\prime=2$ are observed for this system but exhibit no rotational structure and bands with $\rm v\sp\prime>2$ are not observed, indicating that the predissociation lifetimes of these upper levels fall rapidly for $\rm v\sp\prime>1.$ Data presented lead to rotational energies and molecular constants for the $a\ \sp3\Sigma\sbsp{u}{+}$ and $7p\sigma\ \sp3\Sigma\sbsp{g}{+}$ states, including the effective rotational constant $B\sb{e},$ which is determined to be 0.1412 cm$\sp{-1}$ and 0.1345 cm$\sp{-1}$ for the $4s\sigma\ a\ \sp3\Sigma\sbsp{u}{+}$ and $7p\sigma\ \sp3\Sigma\sbsp{g}{+}$ states, respectively. Results are compared to ab initio and other calculations, and combined with existing data to produce experimental estimates of $D\sb0$ and $D\sb{e}$ for the $a\ \sp3\Sigma\sbsp{u}{+}$ state of 5700 $\pm$ 200 cm$\sp{-1}$ and 5850 $\pm$ 200 cm$\sp{-1},$ respectively. Made available in DSpace on 2015-09-25T20:10:08Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9834688.pdf: 3871782 bytes, checksum: 6cec16c4bbcfdec45e7d2612154fe79b (MD5) Previous issue date: 1998 Embargo set by: Seth Robbins for item 82506 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 78 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1998. http://hdl.handle.net/2142/81225 (MiAaPQ)AAI9834688 eng Chemistry, Physical Excited State Spectroscopy of Diatomic Argon text Electrical Engineering Electrical Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.